Window-lock.



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JOHN RUMERY, CLEVELAND, OHIO.

WINDOW-LOCK.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed February 8, 1915. Serial No. 6,736.

To all whom it may concern: f

Be it known that I, JOHN RUMERY, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Window-Locks, of whichthe following is a specification.

This invention has reference to window locks, all substantially as shownand described and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a plan view of the inventionin working position on a window and showing the win-.

dows unlocked. Fig. 2 is a like view to Fig. 1 but showing the windowslocked. Fig. 3 is a sectional elevation on line 3 3, Fig. 1, looking tothe left. Fig. 4 is a sectional view on line 4 4, Fig. 2. Fig. 5 is aside elevation of one of the dogs and cross section of the cam.

The idea herein is to have a lock which will prevent the lower sashbeing raised and the upper sash being lowered beyond certainpredetermined positions, and further that both locks should be underthev same control and alike effective in locking the sashes with meansthat cannot be tampered with from without and will be effective inholding the windows against a forced entrance.

To these ends I employ two locking studs or dogs 2 and 3 which may be ofcast metal as shown, or struck up from suitable sheet metal. These dogsare alike and interchangeable and are shown as pivoted between ears 5 ina sheet metal base b adapted to be seated and fixed on the top ofthelower sash in the left hand corner, in this instance. The said dogs arealso provided with heels 7L which extend inward at substantially rightangles to the body thereof from the pivot 4 and are tapered on theirback substantially as shown, so as to deepen toward the pivot. Therelation of said dogs on the base b is at right angles to each other,and said base has a hole in its middle portion adapted to receive ascrew 6 which helps to fasten the base on the lower sash S and servesalso as a pivot for the horizontally rotatable cam C. The said cam alsois preferably struck up from sheet metal and has a counter sunk middleportion or boss at its center resting on said plate and of suchdeviation as will bring the edge of the cam over .the heels h of thesaid dogs. The working edge of the cam lies between the two stops 8thereon, at opposite sides respectively and adapted in one instance tobe turned against dog 2 and in the other against dog 3, or the earscarrying the same, according as said dogs are to be brought intoengaging or disengaging position.

.For engaging or locking purposes I provide plates 10 and 11 for thewindow casing and the upper sash respectively. Ihese plates haveoccasional holes or openings 12 for engagement by the said dogs and theplates are laid flush into their supports to afford the usual smoothsurfaces for the sashes. The play of the dogs in and out on their pivotsis just sufficient to permit engagement in said slots or openings 12 inone instance and to retire them from such engagement when the sashes areto be liberated. The cam edge between thetwo stops 8 provides for thisdifference in conjunction with the taper or incline on the heels t ofthe dogs in conjunction with springs 15 wound about the pivots of thedogs and adapted to throw them out into the locking openings 12 when thecam recedes from said heels as in Figs.y 2 and 4. Thus, the saidy camedge is deepest at al and narrowest at d', these terms .being used inrespect to the pivot 6. In fact the'edge portion l is cut backfartherthan cl sufliciently to give the dogs free outward. swing into lockingposition under the action of their springs 15 while the edge portion alis sufficiently deeper to ride upon the said heels in their heavier baseportions and thus forcibly throw the dogs back to at least uprightposition and withdraw themV entirely from the plates 10 and 11. Bothportions al and d of the cam have sufficient depth to lie across boththe heels l1, at the same time. Figs. 1 and 3 show the dogs in retiredposition and Figs. 2 and 4 in locking position and the handle 16 on thecam serves to rotate it to either position.

Each flaring opening 12 in the plates 10 and 11 provides sufficientclearance at its upper rounded end to admit the dog freely, and theinclined straight sides at the lower end of the slot engage thev sideedges of the spring-pressed dogs and keep the window from rattling.

What I claim is:

A lock as described having two dogs pivoted at right angles to eachother and hzwand said edge portion having opposite stops 10 ingprojections behind their pivots tapered at its ends.

inward and downward on their upper sur- In testimony whereof I aiiix mysignature face, in combination with a, flat' substantially in presenceof two witnesses.

disk-shaped cam having a pivot approxi- .mately at its middle and anedge portion JOHN RUMERY.

of varying depths from said pivot adapted Witnesses Y to be brought oversaid projections succes- R. B. MOSER,

sively and change the positions of said dogs, GEO. E. KRICKER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

